<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        p{
            font-weight: bold;
            color: rgb(185, 94, 45);
            text-align: center;
            width: 500px;
            letter-spacing: .5em;
        }
        .text{
            text-align: left;
            text-indent: 2em;
            text-decoration: underline;
        }
        a{
            text-decoration: none;
        }
        .logo{
            width:500px;
            height: 300px;
            border:5px solid red;
            border-radius: 20px;
            background-image: url(btn.png);
            background-repeat: no-repeat;
            /* background-size: 100%; */
            background-position: left bottom;
        }
        .circle{
            width: 100px;
            height:100px;
            background-color: aqua;
            border-radius: 50px;
            display: none;
            visibility: hidden;
        }
    </style>
</head>
<body>
    <p>段落1</p>
    <p>段落2</p>
    <p>段落3</p>
    <p>段落4</p>
    <p class="text">
        Lorem, ipsum dolor sit amet consectetur adipisicing elit. Explicabo quis alias amet mollitia nihil voluptatibus tenetur voluptatem ut vitae qui! Delectus soluta eum eligendi ipsam vel porro doloribus molestiae. Esse?
    </p>
    <div>
        <a href="#">百度</a>
    </div>
    <div class="logo"></div>
    <div class="circle"></div>
</body>
</html>